Marathon Infinity

Marathon Infinity takes the closed universe of the Marathon series and blows it wide open. This multi-faceted product begins with "Blood Tides of Lh'owon," a new 20-level scenario sporting new textures, weapons, and aliens. More than that, the scenario sheds a surprising new light on the story's characters and the meaning of events. Having defeated the Pfhor and reawakening the ancient remnants of the S'pht, the player now faces a world where friends become enemies and all is not what it seems...

Marathon 2: Durandal

Fresh from your triumph on the starship Marathon, you are seized by the rogue computer Durandal to do his bidding in a distant part of the galaxy. Within the ruins of an ancient civilization, you must seek the remnants of a lost clan and uncover their long-buried secrets. Battle opponents ancient and terrible, with sophisticated weapons and devious strategies, all the while struggling to escape the alien nightmare...

Marathon

You are far in the future on a colony ship deep in outer space. A security officer on the mission, you are the last hope for defending the ship as hostile and intelligent aliens prepare to destroy every living thing…